Simplexx 212 dimensions

Our easiest to build speaker lineup.
Post Reply
Message
Author
Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Simplexx 212 dimensions

#1 Post by Chopthebass » Fri Jun 10, 2016 12:43 pm

This is my first post on the Forum!

I just bought a bass guitar amp from a guy who is recommending I look into building the Simplexx 12. I think I am more interested in the 2x12 version, but I was wondering if the width can be increased from 20 to 22" without affecting the sound? It's just aesthetics as the amp is in a rack case, and your rig has to look good right!!

Grant Bunter
Posts: 5805
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Simplexx 212 dimensions

#2 Post by Grant Bunter » Fri Jun 10, 2016 3:44 pm

Hi Chopthebass,
Welcome to the forum :)

A few things.
Do you have any woodworking experience?
Or are you prepared to have a go?

The Simplexx series are the easiest build, they are direct radiator cabs which are basically cubes.
The Simplexx series don't perform as well as the other designs Bill has up for offer.
The benefit of better performance (through higher sensitivity, gained by cab design) is more output with less amp requirement.

By far and away the most often suggested cab here for bass is the Jack series. These are more difficult to build than the Simplexx series, but plenty of novice woodworkers here will tell you they are not impossible.
And if you do have some woodworking experience, then Jack lite cabs might be the go, the benefit being to reduce cab weight.

2 x 1 x 10 or 2 x 10?
Again, more often than not, most people here will say 2 x 1 x 10.
That makes your rig scaleable, so for example one cab for rehearsal, 2 if and when required.

The plan sizes are critical. Make the cabs according to plan, for guaranteed best results.
With the Simplexx, that would mean "dressing up" the actual box size to make it suite your requirement for 22" width.

Just so happens a Jack 12 is 22" wide...
Built:
DR 250: x 2 (melded array) with March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

User avatar
Bill Fitzmaurice
Site Admin
Posts: 26076
Joined: Tue May 02, 2006 5:59 pm

Re: Simplexx 212 dimensions

#3 Post by Bill Fitzmaurice » Fri Jun 10, 2016 3:50 pm

Chopthebass wrote:I was wondering if the width can be increased from 20 to 22" without affecting the sound?
As is the case with all enclosures changing the size changes the cab tuning and that changes the sound. You can go wider but you'd have to make it shorter and/or shallower to maintain the same internal volume.

Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Re: Simplexx 212 dimensions

#4 Post by Chopthebass » Sun Jun 12, 2016 4:19 pm

I will need to investigate the Jack. I know nothing about any of Bills speakers. The guy I bought the GK amp from has built two Simplexx 12's and said they are loud and punchy. Are the Jacks a better choice for a bass player? I play 5-string so need them to handle that. Is there a HF horn in the Jack?

I really want a 2x12. How tall would that be? And could I build a second 212 to stack on top? The amp is 650w into 8-ohms and 1080w into 4-ohms.
What drivers would you recommend?

Thanks

Grant Bunter
Posts: 5805
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Simplexx 212 dimensions

#5 Post by Grant Bunter » Sun Jun 12, 2016 5:07 pm

Chopthebass wrote:I will need to investigate the Jack. I know nothing about any of Bills speakers. The guy I bought the GK amp from has built two Simplexx 12's and said they are loud and punchy.

Are the Jacks a better choice for a bass player?
The Jack line are more efficient, and better performing, than the Simplexx line
They will be louder, with less power.


I play 5-string so need them to handle that. Is there a HF horn in the Jack?

There's very few commercial bass cabs in the market that can even adequately reproduce the fundamental of a regular 4 string bass, much less the lower 5 string.
Most bass cabs manage that by being able to more than adequately reproduce the required harmonics of the low notes. The same can be said for the Jack series.

There are multiple HF options in the Jack line. One of the (semi retired) authorised builders "Harley" has even posted up a half/full/off switching arrangement specifically for bass players with piezo loaded Jacks


I really want a 2x12. How tall would that be?
A 2 x 12 J12 is 35" high, 22 wide, 18 deep.

And could I build a second 212 to stack on top?
The amp is 650w into 8-ohms and 1080w into 4-ohms.

Sure. You can do whatever blows your hair back.
Normally, a 2 x 12 would have the two drivers wired in parallel for a nominal 4 ohm load.
Since your amp is not 2 ohm capable, you're going to have to think about wiring options to add another 2 x 12 cab though.


What drivers would you recommend?
There's a bunch of drivers recommended in the plans, and they specifically suit the design.
You can make choices, based on power handling requirements and budget


Thanks
Built:
DR 250: x 2 (melded array) with March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Re: Simplexx 212 dimensions

#6 Post by Chopthebass » Sun Jun 12, 2016 10:52 pm

Thanks Grant.

I have had lots of purchased cabinets that have, to my ears, produced awesome Low B on my bass. I just want to be able to build my own that perform just as good, or I may as well purchase something!

I will search the forum and see if there are other bass players using these Jacks

Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Re: Simplexx 212 dimensions

#7 Post by Chopthebass » Sun Jun 12, 2016 10:56 pm

[quote
Normally, a 2 x 12 would have the two drivers wired in parallel for a nominal 4 ohm load.
Since your amp is not 2 ohm capable, you're going to have to think about wiring options to add another 2 x 12 cab though.[/color][/quote]

If I build cabs I will make them 8 ohms. So with the amp in bridge mode it will be 650w. If I add another 212 cab I get full amp power.

I was hoping to get some advice on the best driver for bass guitar.

Grant Bunter
Posts: 5805
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Simplexx 212 dimensions

#8 Post by Grant Bunter » Sun Jun 12, 2016 11:18 pm

Chopthebass wrote:Thanks Grant.

I have had lots of purchased cabinets that have, to my ears, produced awesome Low B on my bass. I just want to be able to build my own that perform just as good, or I may as well purchase something!

I will search the forum and see if there are other bass players using these Jacks
I'll let the bass players chime in on what they built in terms of size, what driver they selected and why, for the Jacks...
Built:
DR 250: x 2 (melded array) with March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

User avatar
Bill Fitzmaurice
Site Admin
Posts: 26076
Joined: Tue May 02, 2006 5:59 pm

Re: Simplexx 212 dimensions

#9 Post by Bill Fitzmaurice » Mon Jun 13, 2016 6:54 am

Chopthebass wrote:If I add another 212 cab I get full amp power.
I see that quote all the time, especially on electric bass forums. Here's the deal: It doesn't matter!
Power does not define how much output you will get. It's probably the least important spec for either an amp or a speaker.
Simplexx or Jack, build a 112, using the best driver you can afford. If it's not loud enough build another. The likelihood that you'd need more than two is extremely low.
As to building something 'as good' as commercial cabs, you've got that backwards. It would be the very rare commercial cab that can match the Simplexx 12, and as for a commercial cab that matches the Jack 12, that list is very short: there are none.

Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Re: Simplexx 212 dimensions

#10 Post by Chopthebass » Mon Jun 13, 2016 8:28 am

Thanks Bill.

I don't admit to knowing much about the technical side. I just assumed that if you have a 1000w amp you need drivers that can handle that.

So if I went with a 2 x 12 or maybe two 1 x 12 Jacks, and used eminence 2512 drivers, I will ignore the fact that it has 500w worth of drivers installed. And I would rather lug around the bare minimum rather than doubling up later on. Sounds like a 2x12 set up will suffice.

Without getting too technical, would there be any gain in using the 3012HO instead of 2512's? I know its a more expensive option, but not sure the effect of the increased xmax?

User avatar
Tom Smit
Posts: 6463
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Simplexx 212 dimensions

#11 Post by Tom Smit » Mon Jun 13, 2016 9:14 am

3012HO will go louder due to increased Xmas, thus increased power handling.
TomS

Bruce Weldy
Posts: 6300
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Simplexx 212 dimensions

#12 Post by Bruce Weldy » Mon Jun 13, 2016 9:27 am

Tom Smit wrote: increased Xmas
That mean Santa comes on Christmas Eve and Christmas Day?

I like that.....a lot....a whole lot....

:mrgreen:

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

User avatar
Bill Fitzmaurice
Site Admin
Posts: 26076
Joined: Tue May 02, 2006 5:59 pm

Re: Simplexx 212 dimensions

#13 Post by Bill Fitzmaurice » Mon Jun 13, 2016 11:50 am

Chopthebass wrote: I just assumed that if you have a 1000w amp you need drivers that can handle that.
Only if it has no volume control. 8)

Chopthebass
Posts: 72
Joined: Fri Jun 10, 2016 12:28 pm

Re: Simplexx 212 dimensions

#14 Post by Chopthebass » Mon Jun 13, 2016 1:07 pm

Thanks everyone! Think I know what I need to do now.

Post Reply